Part of a comprehensive range of freewheel and Bottom bracket removal tools. Oversized centre hole and thin wall design allows use without removal of cones and locknuts. Investment cast and heat-treated for strength and durability. One-inch base fits end of SR-1 FRW-1 Park tools or simply an adjustable wrench or bench vice. High strength tool steel. Fits 12 tooth internally-splined Record Chorus and Athena cartridge bottom brackets and Campagnolo cassette hub lockrings.